8x/0.6=2.4 5.06x+0.94x=1.8
(X+X)+(X-X)+(X*X)+(X/X)=100
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
X 7 X - X 7 X = X 9 8 X 9 X - X 9 X = 4 9
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
2.4x-1.4x-3x=5.2-8
x-x/5=2.4 (求未知数x) 12÷5%x=8 4x+x=12.5
x+x=x+15
解方程X-1/3X=1.8 X-1/8X=9.45 X-2/5X=1.44
[10x+(8-x)][(8-x)*10+x]=1855